[TenTec] RX366

[Duane Calvin]

Sounds like you got it right, Ray.  I have a slightly different view.  I
find the stock subRX to be fine for DXing because I use the MainRX to listen
to the DX.   After all, he's the one getting clobbered by the cops,
tuner-uppers, QRMers, etc.  The SubRX is great for finding who's calling him
and where the pileup is.  Any more, it seems the worst place to call is on
top of the last worked station because you and 20 others are in that same
spot.  The SubRX is great for lining up the Transmit VFO in the pileup, I
find. 

For what it's worth - we all do it our own way!

	73, Duane


Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com  




-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of
Rsoifer at aol.com
Sent: Monday, May 20, 2013 2:08 PM
To: tentec at contesting.com
Subject: Re: [TenTec] RX366

Hi all,
 
Since I started this thread a few days ago, let me try to summarize where  
we are.
 
John Henry says that the RX366 is essentially the Eagle receiver, while the 
 stock Orion/Orion II sub rx is essentially the Jupiter receiver.  Rob  
Sherwood's tests show that the Eagle receiver is almost as good as the Orion

II main rx, inside the ham bands.  I can't find where, or if, Rob  ever 
tested the Jupiter but you can go to the TT web site and  download the
specs.  
Barry tested the two sub receivers and found that  the RX366 was much better

inside the ham bands but the stock unit was much  better in the 9 MHz SWL 
band as well as in the AM BCB.
 
Do you need the RX366?  If you are a serious contester, or if you have  an 
active ham next door, then probably yes.  If not, then the stock unit is  
probably good enough, especially if you do any listening outside the ham  
bands.
 
Did I get it right?
 
73 Ray W2RS
 
 
In a message dated 5/20/2013 2:22:57 P.M. GMT Standard Time, Rick at DJ0IP.de  
writes:

John,  there were two threads going on under the same subject.

I was not  responding to the AM Broadcast issue, but rather to the question
how big  the difference is between the old 2nd RX and the new 2nd RX on the
Ham Band  performance.  

There the upwards vs. downwards conversion makes a  significant difference.

73
Rick, DJ0IP

-----Original  Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf  Of John Henry
Sent: Monday, May 20, 2013 2:38 PM
To: Discussion of  Ten-Tec Equipment
Subject: [TenTec] RX366

Actually, a lot of this is  misunderstood.

The RX366 related to how good or bad it receives AM  Broadcast has nothing 
to
do with upconversion or downconversion.

The  reason the RX366 doesn't provide AM Broadcast reception as good as the
ham  bands is due to a broadcast band filter before the roofing filters.
This is  to ensure that the umpteen hundred gigawatt station 2 miles down 
the
road  does not get into the receiver path. You can measure differences in  
ham
bands when the local AM station is at full power in a rig that doesn't  have
a broadcast band filter. The original sub receiver in the
565/566  was actually the Jupiter receiver, and it did not have a broadcast
band  filter in line.

What we did fail to realize though when designing the  Eagle and it's
subsequent reuse as the RX366, is that hams would want to  use their Eagle 
as
a high quality AM broadcast band receiver in the ham  shack.
Me, personally, I'd go down to radio shack and pick up a  $12.00
AM/FM/Weather/etc radio for this, and get the RX366 to get the best  2nd rx
for ham operations.
.... Just my two cents.

For future  rigs, we will consider the impact of having a separate path in
the  preselector for AM Broadcast and treat it as a band of it's own. But
that  is up to discussion/design/prototyping in house.

Thanks, and  73,
John Henry, KI4JPL
TEN-TEC  Engineering
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